function g = sigmoid(z)
%SIGMOID Compute sigmoid function
%   g = SIGMOID(z) computes the sigmoid of z.

% You need to return the following variables correctly
g = zeros(size(z));

% ====================== YOUR CODE HERE ======================
% Instructions: Compute the sigmoid of each value of z (z can be a matrix,
%               vector or scalar).

% for i=1:size(z,1),
%   for j=i:size(z,2),
%     g(i,j) = 1.0 / (1.0 + exp(-z(i,j)));
%   end;
% end;

g = 1.0 ./ (1.0 + exp(-z));

% =============================================================

end
